Maybe they're intimidated or bored by the phrase "Music Education". If you find another name for your program that emphasizes fun, play, etc., they may be more receptive. Then you can mention the educational benefits as a sidebar in the description of the program.

Remember, you're trying to convince parents to part with their hard-earned money when their budgets may already be stretched thin. You have to make it sound attractive for them to do so. Saying "it's good for them" won't put you at the front of the line of all the other programs that are good for them. Advertise aggressively: make it "flashy" !